This resource covers one specific 3rd grade standard, and that is how to round whole numbers to the nearest 10 and 100.
There are specific activities for rounding to nearest 10 and then similar activities for rounding to the nearest 100. There is a culminating practice sheet at the end that could be used as a quiz grade or for homework.
This could be a great resource for reteaching this concept to any student who does not understand rounding or who needs more practice with this concept. The activity could be used for math centers.